Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.
The wireless communication system according to the embodiment of the present invention suitably uses the prior art when operating. But this prior art is for example, but not limited to, existing LTE. Further, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and beyond (e.g., NR) unless otherwise specified.
In the embodiment of the present invention, the Duplex (Duplex) scheme may be a TDD (Time Division Duplex: time division Duplex) scheme, an FDD (Frequency Division Duplex: frequency division Duplex) scheme, or a scheme other than the TDD (Flexible Duplex) scheme, for example.
In the embodiment of the present invention, the radio parameter "configured" may be a predetermined value set in advance (Pre-configuration), or may be a radio parameter notified from the base station 10 or the terminal 20.
Fig. 1 is a diagram showing a configuration example of a wireless communication system. As shown in fig. 1, the wireless communication system in the embodiment of the present invention includes a base station 10A, a base station 10B, a base station 10C, a terminal 20 as a UE, a switch 30 as an MME, and a serving gateway 31 as an S-GW. Fig. 1 shows 3 base stations 10, 1 terminal 20, 1 switch 30, and 1 service gateway 31, but this is only an example, and a plurality of base stations may be used. In addition, for example, in a NR (New Radio: new air interface) system instead of LTE, the base station 10 may correspond to a gNB, the switch 30 may correspond to an AMF (ACCESS AND Mobility Management Function: access and mobility management function) or the like, and the service gateway 31 may correspond to a device or function of another name such as an SMF (Session Management Function: session management function) or a UPF (User Plane Function: user plane function).
The base station 10 is a communication device that provides 1 or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by a time domain, which may be defined by the number of OFDM symbols, and a frequency domain, which may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signals are, for example, PSS (Primary Synchronization Signal: primary synchronization signal) and SSS (Secondary Synchronization Signal: secondary synchronization signal). A part of the system information is transmitted, for example, through the PBCH, also called broadcast information. The synchronization signal and the broadcast information may also be transmitted periodically. For example, the base station 10 transmits control signals or data to the terminal 20 through DL (Downlink) and receives control signals or data from the terminal 20 through UL (Uplink). The base station 10 is connected to the switch 30 and the service gateway 31, respectively.
The terminal 20 is a communication device having a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, and a communication module for M2M (Machine-to-Machine), and the terminal 20 receives a control signal or data from the base station 10 through DL and transmits the control signal or data to the base station 10 through UL, thereby utilizing various communication services provided by a wireless communication system.
The switch 30 is a switch that accommodates the base station 10 and provides a mobility-related control function, a bearer-related control function, and the like. For example, the switch 30 has a function of controlling DRX or eDRX and a function of sending out a page when an incoming call is received. Pages may be sent out to multiple base stations 10 based on tracking areas, etc.
The serving gateway 31 is a packet switch over an LTE network. The service gateway 31 has a function of transmitting and receiving user data.
The switch 30 and the service gateway 31 are included in EPC (Evolved Packet Core: evolved packet core) as a core network. The EPC accommodates an access network of LTE, and is a network composed of a switch, a subscriber information management device, and the like. The terminal 20 communicates with the core network via a radio access network.
Fig. 2 is a set of examples for illustration eDRX (extended Discontinuous Reception). WUS (Wake Up Signal) defined in 3GPP (3 rd Generation Partnership Project: third generation partnership project) is a technology for reducing paging reception processing when the terminal 20 performs intermittent reception such as eDRX, and realizing power saving. Before the reception opportunity of the paging, a signaling is performed between the base station 10 and the terminal 20, and the terminal 20 determines whether or not the paging process is started. The terminal 20 can reduce the power associated with the activation of the wireless function by skipping unnecessary paging reception processing.
The eDRX period may be specified as an integer multiple of the H-SFN (HYPER SYSTEM FRAME Number: super system frame Number) shown in fig. 2. The switch 30 may determine the eDRX cycle for each terminal 20 and notify the base station 10. For example, the SFN (SYSTEM FRAME Number: system frame Number) may be 10ms, and the H-SFN may be composed of 1024 SFNs and be 10.24s. The H-SFN that the terminal 20 attempts to receive is referred to as the PH (PAGING HYPERFRAME: paging superframe) shown in fig. 2.
In eDRX, H-SFN-LEVEL TIME synchronization (H-SFN-LEVEL TIME synchronization) is performed between the switch 30 and the base station 10 and the terminal 20. The H-SFN level time synchronization means synchronization by a difference of about several seconds, for example. The switch 30 transmits a page at an appropriate timing, thereby performing an incoming call process. The period during which the terminal 20 attempts paging reception within the PH is called PTW (PAGING TIME Window: paging time Window). Switch 30 sends pages to base station 10 according to the PTW.
SFN level time synchronization is performed between the base station 10 and the terminal 20. The period during which paging can be handled between the base station 10 and the terminal 20 is called PO (Paging Occasion: paging occasion), and the terminal 20 receives paging at the timing of PO within the PTW. Here, by confirming the presence or absence of paging between the base station 10 and the terminal 20 before the PTW, WUS can notify the terminal 20 of information indicating whether to skip the PO included in the PTW from the base station 10. As shown in fig. 2, the period from the end of WUS to the start of PO is referred to as Time offset (Time offset), and the SFN including PO is referred to as PF (PAGING FRAME: paging frame).
As shown in 1) of fig. 2, when the determination of WUS is performed before the transmission of the page from the switch 30, the paging does not reach the base station 10, and therefore the information that the POs included in the PTW can be skipped is notified to the terminal by WUS. Therefore, as shown in 2) of fig. 2, since the terminal 20 recognizes that the page does not arrive by WUS, the reception process for the PO included in the PTW is skipped.
As described above, when the determination of the presence or absence of the paging related to WUS is started before the paging transmission by the switch 30, the terminal 20 does not perform the reception process, and therefore cannot receive the paging.
In addition, in eDRX, strict time synchronization is not required with respect to time synchronization between associated devices, but depends on installation or operation. In operation of eDRX, even when the time synchronization accuracy is lowered, if the switch 30 transmits a page, the page can be received by the terminal 20 in the subsequent PO. However, in the case of introducing WUS, there is a case where the WUS has a function of skipping the subsequent PO, and therefore, the WUS cannot be remedied. The WUS information is managed between the base station 10 and the terminal 20, and is not notified to the switch 30. Therefore, it is difficult to perform control in the switch 30 in which WUS is conceived.
Therefore, when the switch 30 determines that the terminal 20 to which eDRX is applied is in eDRX application and the paging is reserved in the core network, the paging transmission time is adjusted so that the paging is transmitted earlier than the conventional transmission time. By advancing the transmission timing of the page on the core network side irrespective of the number of offset seconds of WUS and PO, the timing of the page and the ordering of WUS can be ensured, and the reception failure of the terminal 20 can be suppressed.
For example, the switch 30 determines whether or not eDRX is applied, and determines whether or not paging reservation is applied. Further, for example, the switch 30 determines that the adjustment of the timing at which paging is not necessary, based on the result of the determination. Further, for example, in the case of time adjustment requiring paging, the switch 30 selects an appropriate number of seconds.
Fig. 3 is a diagram for explaining an example of eDRX in an embodiment of the present invention. In the switch 30, whether or not eDRX related to a certain terminal 20 is applied and whether or not paging reservation is required are determined, and the paging occasion is adjusted as necessary so as to be advanced. By the function of adjusting the paging occasion, the paging occasion can be advanced, and the switch 30 can transmit a page to the base station 10 before WUS determination.
As shown in 1) of fig. 3, the switch 30 advances the paging occasions by an offset. As shown in fig. 3, 2), the decisions related to WUS must be made after paging. Since the WUS determination of the base station 10 is performed after the paging is transmitted from the switch 30, the terminal is notified of information indicating that the PO included in the PTW needs to be received by the WUS. Accordingly, as shown in 3) of fig. 3, since the terminal 20 recognizes that the paging reception process is required using WUS, the reception process for the PO included in the PTW is performed.
Fig. 4 is a timing chart for explaining the operation of the wireless communication system according to the embodiment of the present invention. An example of processing related to paging reception in eDRX shown in fig. 3 is described using a timing chart shown in fig. 4.
In step S1, the switch 30 determines the eDRX timer. Next, the switch 30 notifies the terminal 20 of the eDRX timer (S2). In step S3, eDRX is started in the terminal 20, the base station 10, and the switch 30.
In step S4, the service gateway 31 receives a Downlink (Downlink) packet addressed to the terminal 20. In the next step S5, the service gateway 31 transmits "Downlink Data Notification (downlink data notification)" to the base station 10. Here, GTP (GPRS Tunnelling Protocol: GPRS tunneling protocol) v2 is an access control protocol, and "Downlink Data Notification (downlink data notification)" is a message for notifying switch 30 that there is an incoming call in terminal 20. In the next step S6, the switch 30 makes a determination regarding paging occasion adjustment.
Fig. 5 is a flowchart for explaining the operation of the switch 30 in the embodiment of the present invention. The process of the switch 30 in step S6 shown in fig. 4 will be described in detail with reference to fig. 5.
In step S61, the switch 30 receives an incoming call request from the service gateway 31. Next, the switch 30 determines whether eDRX of the terminal 20 corresponding to the incoming call request is in the process of being started. If eDRX is not being started (no in S62), the process proceeds to step S63, and if eDRX is being started (yes in S62), the process proceeds to step S64. In step S63, the switch 30 immediately sends out a page to the base station 10 and ends the flow.
On the other hand, in step S64, the switch 30 determines whether or not paging reservation of the terminal 20 corresponding to the incoming call request is required. If the paging reservation is not required (no in S64), the process proceeds to step S63, and if the paging reservation is required (yes in S64), the process proceeds to step S65. For example, when the terminal 20 is in the Wakeup state although it is eDRX enabled, it is determined that paging reservation is not necessary.
In step S65, the switch 30 adjusts and saves the paging output time. For example, the time n seconds earlier is saved. For example, n seconds may be a time corresponding to a period from the end of WUS to the start of PO, and n is not limited to an integer. In eDRX, for example, since the timing synchronization of the H-SFN level is performed between the switch 30 and the base station 10 and the terminal 20, the switch 30 may set n so that the switch 30 transmits a page to the base station 10 before the determination regarding WUS, based on the timing when the determination regarding WUS is assumed to be performed in the PH by the base station 10 and the time added according to the synchronization accuracy. Next, the switch 30 instructs the service gateway 31 of buffering of the packet (S66) and ends the flow.
Returning to fig. 4. In step S7, the switch 30 transmits "DDN ack" to the service gateway 31. The information indicating the buffering of the packet shown in fig. 3 may also be transmitted to the service gateway 31 together with "DDN ack". Next, the service gateway 31 holds a Downlink packet addressed to the terminal 20 (S8).
In step S9, the switch 30 starts paging at the adjustment time determined in step S6. The switch 30 transmits a page to the base station 10 (S10). The S1AP is a protocol defining a function between the switch 30 and the base station 10 required for communication control of the terminal 20. Here, as shown in fig. 4, the paging is transmitted earlier to the base station 10 by an offset amount than the paging transmission based on the existing timing.
Next, the base station 10 recognizes a case with paging to the terminal 20 (S11). Next, the base station 10 uses the broadcast information to transmit WUS indicating that paging reception is required to the terminal 20 (S12). In step 13, the terminal 20 determines that paging reception is required based on the received WUS. Next, the terminal 20 receives a page based on RRC (Radio Resource Control: radio resource control) signaling from the base station 10 in the PO.
In the above-described operation of the terminal 20 to skip the paging process by using WUS, the terminal 20 may have a state of whether or not to apply a function of reducing the paging reception process in intermittent reception. The base station 10 and the switch 30 may set the state in the terminal 20 or acquire the state from the terminal 20. By reducing the paging reception process, power saving of the terminal 20 can be achieved.
In order to prevent paging from being transmitted from the switch 30 to the base station 10 after WUS, the base station 10 may transmit information indicating whether WUS is transmitted or not to the switch 30, or may transmit information indicating the transmission time of WUS to the switch 30. The switch 30 can adjust the timing of transmitting the page based on the information indicating the transmission timing of WUS received from the base station 10.
According to the above-described embodiment, when an incoming call arrives at the terminal 20, the switch 30 determines whether or not eDRX concerning the terminal 20 is to be applied and whether or not paging reservation is necessary, and adjusts the paging occasion so as to advance the paging occasion as necessary, whereby it is possible to transmit a page to the base station 10 before WUS-concerning determination processing in the base station 10.
That is, in the wireless communication system, the possibility of receiving a page at the time of intermittent reception can be improved.
(Device Structure)
Next, a functional configuration example of the base station 10, the terminal 20, and the switch 30 that execute the above-described processing and operation will be described. The base station 10, the terminal 20 and the switch 30 contain the functions of implementing the above-described embodiments. However, the base station 10, the terminal 20, and the switch 30 may each have only some of the functions in the embodiments.
< Base station 10>
Fig. 6 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention. As shown in fig. 6, the base station 10 includes a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in fig. 6 is merely an example. The names of the functional sections and the functional distinction may be arbitrary as long as the operations according to the embodiments of the present invention can be executed.
The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. Further, the transmitting unit 110 transmits an inter-network node message to other network nodes. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher-layer information from the received signals. The transmitting unit 110 also has a function of transmitting PSS, SSS, PBCH, DL/UL control signals and the like to the terminal 20. Further, the receiving unit 120 receives an inter-network node message from another network node.
The setting unit 130 stores preset setting information and various setting information transmitted to the terminal 20. The content of the setting information is, for example, setting information related to intermittent reception and paging.
As described in the embodiment, the control unit 140 performs control related to intermittent reception and paging. The transmitting unit 110 may include a function unit related to signal transmission in the control unit 140, and the receiving unit 120 may include a function unit related to signal reception in the control unit 140.
< Terminal 20>
Fig. 7 is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention. As shown in fig. 7, the terminal 20 includes a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in fig. 7 is merely an example. The names of the functional sections and the functional distinction may be arbitrary as long as the operations according to the embodiments of the present invention can be executed.
The transmitting unit 210 generates a transmission signal from the transmission data, and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and acquires a higher layer signal from the received physical layer signal. The receiving unit 220 also has a function of receiving PSS, SSS, PBCH, DL/UL/SL control signals and the like transmitted from the base station 10. For example, as D2D communication, the transmitting unit 210 transmits PSCCH (PHYSICAL SIDELINK Control Channel: physical side link Control Channel), PSSCH (PHYSICAL SIDELINK SHARED CHANNEL: physical side link shared Channel), PSDCH (PHYSICAL SIDELINK Discovery Channel: physical side link discovery Channel), PSBCH (PHYSICAL SIDELINK Broadcast Channel: physical side link broadcast Channel) and the like to the other terminal 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH and the like from the other terminal 20.
The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. The setting unit 230 also stores preset setting information. The content of the setting information is, for example, setting information related to intermittent reception and paging.
As described in the embodiment, the control unit 240 performs control related to intermittent reception and paging. The transmitting unit 210 may include a function unit related to signal transmission in the control unit 240, and the receiving unit 220 may include a function unit related to signal reception in the control unit 240.
< Switch 30>
Fig. 8 is a diagram showing an example of the functional configuration of the switch 30 according to the embodiment of the present invention. As shown in fig. 8, the switch 30 includes a transmitting unit 310, a receiving unit 320, a setting unit 330, and a control unit 340. The functional configuration shown in fig. 8 is merely an example. The names of the functional sections and the functional distinction may be arbitrary as long as the operations according to the embodiments of the present invention can be executed. The network node such as the service gateway 31 may have the functional unit shown in fig. 8 and realize the functions described in the embodiments.
The transmitting unit 310 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal. Further, the transmitting unit 310 transmits an inter-network node message to other network nodes. The receiving unit 320 receives various signals transmitted from the terminal 20. Further, the receiving unit 320 receives an inter-network node message from another network node.
The setting unit 330 stores preset setting information and various setting information transmitted to the terminal 20 or other network nodes. The content of the setting information is, for example, setting information related to communication between network nodes, setting information related to intermittent reception by the terminal 20, or the like.
As described in the embodiment, the control unit 340 performs control related to communication between network nodes. The control unit 340 notifies the base station 10, the terminal 20, or another network node of control information related to intermittent reception. The control unit 340 notifies the control information related to paging to the base station 10, the terminal 20, or another network node. The transmitting unit 310 may include a function unit related to signal transmission in the control unit 340, and the receiving unit 320 may include a function unit related to signal reception in the control unit 340.
(Hardware construction)
The block diagrams (fig. 6, 7, and 8) used for the description of the above embodiment show blocks in units of functions. These functional blocks (structures) are realized by any combination of at least one of hardware and software. The implementation method of each functional block is not particularly limited. That is, each functional block may be realized by using one device physically or logically combined, or may be realized by directly or indirectly (for example, by using a wire, a wireless, or the like) connecting two or more devices physically or logically separated from each other, and using these plural devices. The functional blocks may also be implemented by combining software with the above-described device or devices.
Functionally, there are judgment, decision, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notifying), communication (communicating), forwarding (forwarding), configuration (configuring), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), and the like, but not limited thereto. For example, a functional block (configuration unit) that causes transmission to function is referred to as a transmission unit (TRANSMITTING UNIT) or a transmitter (transmitter). In short, the implementation method is not particularly limited as described above.
For example, the devices such as the base station 10, the terminal 20, and the switch 30 in one embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram showing an example of a hardware configuration of the device according to the embodiment of the present invention. The base station 10 and the terminal 20 may be physically configured as computer devices including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
In addition, in the following description, the term "means" may be replaced with "circuit", "device", "unit", or the like. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the illustrated devices, or may be configured to include no part of the devices.
Each function of the base station 10 and the terminal 20 is realized by reading a predetermined software (program) on hardware such as the processor 1001 and the storage device 1002, and by performing an operation by the processor 1001, and by controlling at least one of communication by the communication device 1004 and reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be configured by a central processing unit (CPU: central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the control unit 140, the control unit 240, and the like may be realized by the processor 1001.
Further, the processor 1001 reads out a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes accordingly. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiment is used. For example, the control unit 140 of the base station 10 shown in fig. 6 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. For example, the control unit 240 of the terminal 20 shown in fig. 7 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. For example, the control unit 340 of the switch 30 shown in fig. 8 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-described various processes are described as being executed by one processor 1001, the above-described various processes may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may also be mounted by more than one chip. In addition, the program may also be transmitted from the network via a telecommunication line.
The storage device 1002 is a computer-readable recording medium, and may be configured by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM: erasable programmable Read Only Memory), EEPROM (ELECTRICALLY ERASABLE PROGRAMMABLE ROM: electrically erasable programmable Read Only Memory), RAM (Random Access Memory: random access Memory), and the like. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement a communication method according to an embodiment of the present disclosure.
The auxiliary storage device 1003 is a computer-readable recording medium, and may be constituted by at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a Floppy disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a Key drive (Key drive)), a Floppy (registered trademark) disk, a magnetic stripe, and the like.
The communication device 1004 is hardware (transceiver) for performing communication between computers via at least one of a wired network and a wireless network, and may be referred to as a network device, a network controller, a network card, a communication module, or the like, for example. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplexing (FDD: frequency Division Duplex) and time division duplexing (TDD: time Division Duplex). For example, a transmitting/receiving antenna, an amplifying unit, a transmitting/receiving unit, a transmission path interface, and the like may be realized by the communication device 1004. The transmitting/receiving unit may be physically or logically separately mounted by the transmitting unit and the receiving unit.
The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a key, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, an LED lamp, or the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrally formed (for example, a touch panel).
The processor 1001 and the storage device 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using a different bus for each device.
The base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal Processor (DSP: DIGITAL SIGNAL Processor), an ASIC (Application SPECIFIC INTEGRATED Circuit), a PLD (Programmable Logic Device) and an FPGA (Field Programmable GATE ARRAY) or a field programmable gate array, and part or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.
In the case where the core network functions such as the service gateway 31 are configured as devices, the same hardware as the switch 30 as shown in fig. 9 may be used.
(Summary of embodiments)
As described above, according to an embodiment of the present invention, there is provided a switch including a receiving unit that receives a message notifying the existence of an incoming call to a terminal from a gateway, a control unit that adjusts a timing of transmitting a page corresponding to the message to a base station, and a transmitting unit that transmits the page to the base station at the adjusted timing.
According to the above configuration, when an incoming call arrives at the terminal 20, the switch 30 can adjust the paging time so as to advance the paging time as necessary, and thereby can transmit a page to the base station 10 before the WUS-related determination processing in the base station 10. That is, in the wireless communication system, the possibility of receiving a page at the time of intermittent reception can be improved.
The control unit may adjust a timing of transmitting a page corresponding to the message to the base station when the terminal is in the intermittent reception state. According to this configuration, when an incoming call arrives at the terminal 20, the switch 30 determines whether or not eDRX related to the terminal 20 is applied, and can transmit a page to the base station 10 before the WUS related determination processing in the base station 10 by adjusting the paging timing so as to advance the paging timing as necessary.
The control unit may adjust a timing of transmitting the page corresponding to the message to the base station when the terminal is in the intermittent reception state and the reservation of the page is required. According to this configuration, when an incoming call arrives at the terminal 20, the switch 30 determines whether or not a paging reservation for the terminal 20 is necessary, and adjusts the paging timing so as to advance the paging timing as necessary, whereby it is possible to transmit a page to the base station 10 before the WUS-related determination processing in the base station 10.
The control unit may be configured to transmit a paging timing corresponding to the message to the base station when a function of reducing the paging reception process at the time of intermittent reception by the terminal is applied. According to this configuration, when an incoming call arrives at the terminal 20, the switch 30 can adjust the paging timing as necessary, and thereby can transmit a page to the base station 10 before the WUS-related determination process in the base station 10.
The control unit may adjust a time at which a page corresponding to the message is transmitted to a base station to a time before the base station transmits an activation signal to the terminal. According to this configuration, when an incoming call arrives at the terminal 20, the switch 30 can adjust the paging time so as to advance the paging time as necessary, and thereby can transmit a page to the base station 10 before the WUS-related determination process in the base station 10.
The control unit may adjust a time at which the paging corresponding to the message is transmitted to the base station to a time before the determination of the presence or absence of the paging related to the start signal transmitted from the base station to the terminal is performed. According to this configuration, when an incoming call arrives at the terminal 20, the switch 30 can adjust the paging time so as to advance the paging time as necessary, and thereby can transmit a page to the base station 10 before the WUS-related determination process in the base station 10.
Further, according to an embodiment of the present invention, there is provided a communication method performed by an exchange, including a reception step of receiving a message notifying the existence of an incoming call to a terminal from a gateway, a control step of adjusting a timing of transmitting a page corresponding to the message to a base station, and a transmission step of transmitting the page to the base station at the adjusted timing.
According to the above configuration, when an incoming call arrives at the terminal 20, the switch 30 can adjust the paging time so as to advance the paging time as necessary, and thereby can transmit a page to the base station 10 before the WUS-related determination processing in the base station 10. That is, in the wireless communication system, the possibility of receiving a page at the time of intermittent reception can be improved.
(Supplement of the embodiment)
While the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will appreciate various modifications, substitutions, alternatives, and the like. Specific numerical examples are described for the purpose of promoting the understanding of the present invention, but these numerical values are merely examples unless otherwise indicated, and any appropriate values may be used. The distinction between items in the above description is not essential to the present invention, and two or more items described in one item may be used in combination as required, or items described in another item may be applied (unless contradiction arises). The boundaries of functional units or processing units in the functional block diagrams do not necessarily correspond to the boundaries of physical components. The operation of the plurality of functional units may be performed by one physical component, or the operation of one functional unit may be performed by a plurality of physical components. With regard to the processing procedures described in the embodiments, the order of processing may be exchanged without contradiction. For ease of illustration, the base station 10 and the terminal 20 are illustrated using functional block diagrams, but such means may also be implemented in hardware, in software, or in a combination thereof. The software operating by the processor provided by the base station 10 according to the embodiment of the present invention and the software operating by the processor provided by the terminal 20 according to the embodiment of the present invention may be stored in Random Access Memory (RAM), flash memory, read Only Memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), a removable disk, a CD-ROM, a database, a server, and any other suitable storage medium, respectively.
The information is not limited to the form and embodiment described in the present disclosure, and other methods may be used. For example, the notification of the information may be implemented by physical layer signaling (e.g., DCI (Downlink Control Information: downlink control information), UCI (Uplink Control Information: uplink control information)), higher layer signaling (e.g., RRC (Radio Resource Control: radio resource control) signaling, MAC (Medium Access Control: medium access control) signaling, broadcast information (MIB (Master Information Block: master information block), SIB (System Information Block: system information block)), other signals, or a combination thereof.
The various forms/embodiments described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution: long term evolution), LTE-a (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4 th generation mobile communication system: fourth generation mobile communication system), 5G (5 th generation mobile communication system: fifth generation mobile communication system), FRA (Future Radio Access: future wireless access), NR (new Radio: new air interface), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband: ultra mobile broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), bluetooth (registered trademark), systems using other suitable systems, and next generation systems extended accordingly. Further, a plurality of systems (for example, a combination of 5G and at least one of LTE and LTE-a) may be applied in combination.
The processing procedures, timings, flows, and the like of the respective modes/embodiments described in the present specification can be replaced without contradiction. For example, for the methods described in this disclosure, elements of the various steps are presented using an illustrated order, but are not limited to the particular order presented.
In the present specification, the specific operation performed by the base station 10 may be performed by an upper node (upper node) thereof, as the case may be. In a network composed of one or more network nodes (network nodes) having a base station 10, it is apparent that various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes (for example, MME or S-GW, etc., but not limited thereto are considered) other than the base station 10. In the above, the case where one other network node other than the base station 10 is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).
Information, signals, and the like described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). Or may be input or output via a plurality of network nodes.
The input or output information and the like may be stored in a specific location (for example, a memory), or may be managed using a management table. Information input or output, etc. may be rewritten, updated, or recorded. The outputted information and the like may also be deleted. The input information and the like may also be transmitted to other devices.
The determination in the present disclosure may be performed by a value (0 or 1) represented by 1 bit, may be performed by a Boolean value (true or false), and may be performed by a comparison of numerical values (e.g., a comparison with a predetermined value).
With respect to software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted to mean a command, a set of commands, code, a code segment, program code, a program (program), a subroutine, a software module, an application, a software package, a routine (program), a subroutine (subroutine), an object, an executable, a thread of execution, a procedure, a function, or the like.
In addition, software, commands, information, etc. may be transmitted and received via a transmission medium. For example, where software is transmitted from a web page, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: digital Subscriber Line), etc.) and a wireless technology (infrared, microwave, etc.), at least one of the wired and wireless technologies is included within the definition of transmission medium.
Information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions (commands), information, signals, bits, symbols, chips (chips), and the like may be referenced throughout the above description by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.
In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). In addition, the signal may also be a message. In addition, the component carrier (CC: component Carrier) may also be referred to as carrier frequency, cell, frequency carrier, etc.
The terms "system" and "network" as used in this disclosure may be used interchangeably.
In addition, information, parameters, and the like described in this disclosure may be expressed using absolute values, relative values to predetermined values, or other information corresponding thereto. For example, radio resources may also be indicated by an index.
The names used for the above parameters are non-limiting in any respect. Further, the numerical formulas and the like using these parameters may also be different from those explicitly disclosed in the present disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by all appropriate names, and thus the various names assigned to these various channels and information elements are not limiting in any respect.
In the present disclosure, terms such as "Base Station", "radio Base Station", "Base Station apparatus", "fixed Station", "NodeB", "eNodeB (eNB)", "gndeb (gNB)", "access point", "transmission point (transmission point)", "reception point", "transmission point", "reception point", "cell", "sector", "cell group", "carrier", "component carrier", and the like may be used interchangeably. The terms macrocell, microcell, femtocell, picocell, and the like are also sometimes used to refer to a base station.
The base station can accommodate one or more (e.g., 3) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each of the smaller areas can also provide communication services through a base station subsystem (for example, an indoor small base station (RRH: remote Radio Head (remote radio head)), and the term "cell" or "sector" refers to a part or the entire coverage area of at least one of a base station and a base station subsystem that performs communication services within the coverage area.
In the present disclosure, terms such as "Mobile Station (MS)", "User terminal", "User Equipment (UE)", and "terminal" may be used interchangeably.
For a mobile station, those skilled in the art will sometimes refer to a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, or some other suitable terminology.
At least one of the base station and the mobile station may be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The mobile body may be a vehicle (e.g., an automobile, an airplane, etc.), a mobile body that moves unmanned (e.g., an unmanned aerial vehicle, an autopilot, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things: internet of things) device of a sensor or the like.
In addition, the base station in the present disclosure may be replaced with a user terminal. For example, the various forms/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything system), or the like is also called. In this case, the terminal 20 may have the function of the base station 10. Further, the terms "upstream" and "downstream" may be replaced with terms (e.g., "side") corresponding to the inter-terminal communication. For example, the uplink channel, the downlink channel, and the like may be replaced with side channels.
Likewise, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station may have the functions of the user terminal described above.
The terms "determining" and "determining" used in the present disclosure may include various operations. The "determination" may include, for example, a matter in which a determination (judging), a calculation (computing), a processing (processing), a derivation (deriving), a survey (INVESTIGATING), a search (looking up, search, inquiry) (e.g., a search in a table, a database, or other data structure), or a confirmation (ASCERTAINING) is regarded as a matter in which a "determination" or a "decision" is made. Further, "determining" or "deciding" may include a matter in which reception (e.g., reception of information), transmission (e.g., transmission of information), input (input), output (output), access (accessing) (e.g., access of data in a memory) is performed as a matter in which "determining" or "deciding" is performed. Further, "determining" or "determining" may include taking the matters of solving (resolving), selecting (selecting), selecting (choosing), establishing (establishing), comparing (comparing), etc. as the matters of "determining" or "determining". That is, the terms "determine" and "determining" may include terms that "determine" and "determine" any action. The "judgment (decision)" may be replaced by "imagine (assuming)", "expect (expecting)", "consider (considering)", or the like.
The terms "connected," "coupled," or any variation of these terms are intended to refer to any direct or indirect connection or coupling between two or more elements, including the case where one or more intervening elements may be present between two elements that are "connected" or "coupled" to each other. The combination or connection of the elements may be physical, logical, or a combination of these. For example, "connection" may be replaced with "Access". As used in this disclosure, it is considered that for two elements, the interconnection "or" bonding "is made by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy or the like having wavelengths in the wireless frequency domain, the microwave region, and the optical (including both visible and invisible) region.
The reference signal may be referred to simply as RS (Reference Signal) or Pilot (Pilot) depending on the standard applied.
As used in this disclosure, the recitation of "according to" is not intended to mean "according to" unless explicitly recited otherwise. In other words, the term "according to" means "according to only" and "according to at least" both.
Any reference to elements using references to "first," "second," etc. in this disclosure also does not all limit the number or order of such elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to a first element and a second element do not indicate that only two elements can be taken or that in any form the first element must precede the second element.
The "unit" in the structure of each device may be replaced with "part", "circuit", "device", or the like.
Where the terms "include", "comprising" and variations thereof are used in this disclosure, these terms are intended to be inclusive in the same sense as the term "comprising". Also, the term "or" as used in this disclosure means not exclusive or.
In the present disclosure, for example, where an article is added by translation as in a, an, and the in english, the present disclosure also includes a case where a noun following the article is in plural.
In the present disclosure, the term "a and B are different" may also mean that "a and B are different from each other". The term "a and B are different from C" may also be used. The terms "separate," coupled, "and the like may also be construed as" different.
The various forms and embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Note that the notification of the predetermined information is not limited to being performed explicitly (for example, notification of "yes" or "X"), and may be performed implicitly (for example, notification of the predetermined information is not performed).
In addition, downlink Data Notification is an example of a message notifying that there is an incoming call in the terminal in the present disclosure. The service gateway 31 is an example of a gateway. WUS is an example of a start signal.
The present disclosure has been described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is intended to be illustrative, and not in any limiting sense.
Description of the reference numerals
10, A base station (eNB);
110, a transmitting unit;
A receiving part 120;
130, a setting part;
140, a control part;
20a terminal (UE);
A transmitting unit 210;
220 a receiving section;
230, a setting part;
240, a control part;
a switch (MME);
310, a transmitting unit;
320 a receiving section;
330, a setting part;
340 a control part;
31 a serving gateway (S-GW);
1001, a processor;
1002 a storage device;
1003, auxiliary storage device;
1004 a communication device;
1005, input means;
1006 output means.